Connecting high-redshift galaxy populations through observations of local Damped Lyman Alpha dwarf galaxies

I report on observations of the z=t 0.01 dwarf galaxy SBS1543+593 which is projected onto the background QSO HS1543+5921. As a star-forming galaxy first noted in emission, this dwarf is playing a pivotal role in our understanding of high-redshift galaxy populations, because it also gives rise to a D...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2008-06, Vol.4 (S255), p.129-133
Main Author: Schulte-Ladbeck, Regina E.
Format: Article
Language:English
Subjects:
Astronomy
Contributed Papers
Stars & galaxies
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Summary:I report on observations of the z=t 0.01 dwarf galaxy SBS1543+593 which is projected onto the background QSO HS1543+5921. As a star-forming galaxy first noted in emission, this dwarf is playing a pivotal role in our understanding of high-redshift galaxy populations, because it also gives rise to a Damped Lyman Alpha system. This enabled us to analyze, for the first time, the chemical abundance of α elements in a Damped Lyman Alpha galaxy using both, emission and absorption diagnostics. We find that the abundances agree with one another within the observational uncertainties. I discuss the implications of this result for the interpretation of high-redshift galaxy observations. A catalog of dwarf-galaxy–QSO projections culled from the Sloan Digital Sky Survey is provided to stimulate future work.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921308024691